[FFmpeg-user] ffmpeg optimization question:

[Carl Eugen Hoyos]

John Crossman <johncrossman <at> berkeley.edu> writes:

> 1. ffmpeg -i video1.mp4 -i  *video2.mp4*  -filter_complex
> "[1:v]pad=iw*2:ih[bg];[bg][0:v]overlay=W/2+((W/2-w)/2):(H-h)/2" 
> -qscale:v 2 -strict -2  video3.mp4
> 2. ffmpeg -i video3.mp4  -acodec libmp3lame -ab 64k -ar 22050 
> -r 25 -vcodec libx264 -level 41 -crf 20 -bufsize 20000k 
> -maxrate 25000k -g 250 -s 1280x720 -coder 1  -subq 7 
> -me_range 16 -keyint_min 25 -sc_threshold 40 final.mp4
> 
> My question: How can I optimize the command #2 above?

Why are you using two commands?
Even if decoding is fast, it is certainly a huge overhead.

Carl Eugen